Retain old images about rossjrw

[rossjrw]

Image is located at a URL with the form https://raw.githubusercontent.com/OWNER/REPO/COMMIT_SHA/game/current/board.svg.

There's a problem with that: that URL involves the commit hash for a commit that, with #33, does not yet exist. There's no way of knowing what our next commit hash is going to be. I can't just use the current URL for the current one and log the commit hash URL, because then we'd have caching issues and no one would be able to see the current image.

You know what, I haven't tried it. Let's see what happens.

Because I'm adding to the log each commit, I can't target the current commit to add an absolute URL there, either. But what I can do is go back over the log with each commit and add the hash of the previous commit. Yep. That's a completely foolproof idea.

[rossjrw]

Noting that images currently point to games/current. When a new game is created, that does not need to be changed. The reference by commit hash should be correct.

[rossjrw]

Confirmed - caching is an issue. I'll have to retain the image hash in the event log.

[rossjrw]

You know, I wouldn't have to both generate and retain a special hash for the board image if I just used the issue number.